package com.zhulin.reggie.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.zhulin.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    //设置静态资源映射

    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
      log.info("开始静态资源映射...");
      registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
      registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展mvc的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器..."  );
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java转换成json
        messageConverter.setObjectMapper((new JacksonObjectMapper()));
        //将上面转换器对象追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }
}
